Register 75: Ethernet PHY Identifier Register 2 - MR3 (EPHYID2), address
0x003
The Ethernet PHY Identifier 1 and 2 (EPHYIDn) registers together form a unique identifier. The
identifier consists of a concatenation of the Organizationally Unique Identifier (OUI), the vendor's
model number and the model revision number. A PHY may return a value of zero in each of the 32
bits of the PHY Identifier if desired. The PHY Identifier is intended to support network management.
The Texas Instruments IEEE-assigned OUI is 0x080028. This OUI field is broken into two fields in
the EPHYID1 and EPHYID2 register. The most significant OUI field, OUIMSB in the EPHYID1 register,
is equal to 0x0002 (the two most significant bits of the OUI are ignored). The least significant OUI
field, OUILSB in the EPHYID2 register, is equal to 0x28.
Ethernet PHY Identifier Register 2 - MR3 (EPHYID2)
Base n/a
Address 0x003
Type R, reset 0xA221
0123456789101112131415
MDLREVVNDRMDLOUILSB
ROROROROROROROROROROROROROROROROType
1000010001000101Reset
DescriptionResetTypeNameBit/Field
OUI Least Significant Bits
Bits 19 to 24 of the OUI (0x080028) are mapped from bits 15 to 10 of
this register respectively.
0x28ROOUILSB15:10
Vendor Model Number
The six bits of vendor model number are mapped from bits 9 to 4 (most
significant bit to bit 9).
0x22ROVNDRMDL9:4
Model Revision Number
Four bits of the vendor model revision number are mapped from bits 3
to 0 (most significant bit to bit 3). This field is incremented for all major
device changes.
0x1ROMDLREV3:0
June 18, 20141596
Texas Instruments-Production Data
Ethernet Controller
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